Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV. Journal of High Energy Physics, 2018 (6). pp. 1-53. ISSN 1029-8479

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Abstract

A search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4`, 2`2q, and 2`2ν final states, where ` = e or µ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths

Item Type:	Article (Journal)
Additional Information:	7861/65969
Uncontrolled Keywords:	Hadron-Hadron scattering (experiments), Higgs physics
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	29 Aug 2018 08:51
Last Modified:	29 Aug 2018 08:51
URI:	http://irep.iium.edu.my/id/eprint/65969

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